heat exchanger for pool heating

paul_32

is anyone familiar with the practice of using a brazed plate heat exchanger in conjunction with a hot water boiler (that is already being used to heat a home)to heat a swimming pool.i seen it done not too long ago on a job i was on,but was never able to get any information from the contractor that did it.any information ,pro or con on similar installations would be greatly appreiciated.

J.C.A._3

I've seen a few,

But they weren't flatplate type exchangers. The 2 brands I remember are Triangle Tube and Everhot. They were tube in bundle type exchangers.(BIG flow!)

There is lots to consider when attempting pool heat. I'll do the install, but rely on someone who does it everyday for sizing. Chris

hr

I have always used

the tube and shell type also.

Flat Plate does have a MP marine series for use in chemically treated water, and pool /spa appliations.

Different stainless alloy than the typical 316L used in water or heating plate type HXers. These require ph controlled between 6-7.4. Whereas the MP series handles 2.0 ph.

They show them installed with bypass and balance valves in their catalogs to work in high gpm installs.

hot rod

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[Deleted User]

How big, How big?

How big is the pool, and how big is the boiler? We sell and install pool heaters. If it is an inground, I wouldn't even start with less than 185,000 btu, and usually install 400,000 btu. People don't usually want to wait a week for their pool to warm up. The house boiler is usually to far from the pool. You can buy a decent pool heater for $1000 to $1800, set right at the equipment pad. Just let the customer let their water chemistry get out of whack, and the heat exchanger will scale up or dissolve before their eyes. My advice, get a dedicated pool heater.

Guy_5

Pool Heater

Check out the Super Stor pool heater. It is essentially a small indirect water heater (20 Gal) with a very large heat exchanger coil and large tank tappings. You can see it on our web site at WWW.HTProducts.com.

Guy Woollard
Heat Transfer Products

Ted_5

FlatPlate brand

has a premade panel. It has the plate, pumps, valves, prewired, and a setpoint control. Three pool sizes 125,000 btu, 200,000 btu, and 300,000 btu. It is a nice package.
www.flatplate.com

Ted

FlatPlate rep.

Ken_8

This is the simplest way...

Follow the link. We have installed two of these. One 15 years ago - it still works perfectly!

Check it out as our "first choice"

http://www.weil-mclain.com/netdocs/maxiframes.htm


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Ken_8

Even more popular is the \"free\" one...

I made and have plans for my pool heater. Other than the cost of the fittings, tubing, frame and insulation - it puts out 40,000 BTU per hour every hour the sun is out.

In one day my 17,000 gallon 16x32' pool picks up 3-5°F

I'll post a picture and dimensions if you're interested.

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Dave_13

Yes....

I am interested!!!! I am in the process of making one with a old, giant satelite dish. I am going to spiral black hose on it and let it bake in the sun!!! I am also figuring out how to use the motor to make it follow the sun throughout the day. I was going to make one in a box, but got the free satelite dish and wanted to give it a try!

Jack_23

Tube and shell

My experience anyway. high flow, low temp rise, low pressure drop

David Woycio

Pool heat exch.

We have used both plate and shell in tube HE for years. I prefer shell in tube and ALWAYS go with 316 stainless. Never know what's going to happen with pool water. Ususally shoot for a 2 - 5 deg rise through the HE. Don't want to burn anyone in the pool. Also we like to plumb in isolation valves and drains so you can flush the HE (forwards and backwards) down the road if necessary. If you go with a plate HE you will need to plumb a by-pass. With either HE use CPVC for at least a foot from each end of HE and cover your butt and wire some High limits. I have quite a bit of used equipment (HE's and solar collectors). If interested drop me a line.

Hope this helps

Ken_8

Here's my solar pool heater

We found the output is ~35MBTU/HR from 9 to 5 on these long days.

About 30-lths of inch-and-a-quater ABS plastic pipe, 60- inch-and-a-quarter ABS street tees, a few ells, and you have a ~15x20 HX.

We put 1/2" foil faced insulation directly on the roof/shingles to reflect the sun's radiant into the "shaded" underside of the ABS.

The pipe design is reverse return and the added head (because of the parallel flow) is nil.

If you want more details, please email me.

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